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authorAnthony Koo <Anthony.Koo@amd.com>2018-10-12 21:34:32 -0400
committerAlex Deucher <alexander.deucher@amd.com>2018-11-05 14:21:39 -0500
commit262485a50fd4532a8d71165190adc7a0a19bcc9e (patch)
tree60819d7cabbd30625d27bbd05841e239fdca29c3 /drivers/gpu/drm/amd/display/dc/core/dc_link.c
parenta7d8084b589714ea08bddd3720986b657840f46b (diff)
drm/amd/display: Expand dc to use 16.16 bit backlight
[Why] We want to increase precision for backlight setting. But DC interface takes 8 bit backlight level value only. [How] DMCU already takes 16 bit backlight level. Expand the DC interface to take 16.16 bit value. Max 32 bit backlight value (0xFFFF) will represent max backlight (100%) Signed-off-by: Anthony Koo <Anthony.Koo@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link.c')
-rw-r--r--drivers/gpu/drm/amd/display/dc/core/dc_link.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index f4936f7c5545..643407d18cce 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2141,14 +2141,16 @@ int dc_link_get_backlight_level(const struct dc_link *link)
{
struct abm *abm = link->ctx->dc->res_pool->abm;
- if (abm == NULL || abm->funcs->get_current_backlight_8_bit == NULL)
+ if (abm == NULL || abm->funcs->get_current_backlight == NULL)
return DC_ERROR_UNEXPECTED;
- return (int) abm->funcs->get_current_backlight_8_bit(abm);
+ return (int) abm->funcs->get_current_backlight(abm);
}
-bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
- uint32_t frame_ramp, const struct dc_stream_state *stream)
+bool dc_link_set_backlight_level(const struct dc_link *link,
+ uint32_t backlight_pwm_u16_16,
+ uint32_t frame_ramp,
+ const struct dc_stream_state *stream)
{
struct dc *core_dc = link->ctx->dc;
struct abm *abm = core_dc->res_pool->abm;
@@ -2160,19 +2162,17 @@ bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
if ((dmcu == NULL) ||
(abm == NULL) ||
- (abm->funcs->set_backlight_level == NULL))
+ (abm->funcs->set_backlight_level_pwm == NULL))
return false;
- if (stream) {
- if (stream->bl_pwm_level == EDP_BACKLIGHT_RAMP_DISABLE_LEVEL)
- frame_ramp = 0;
-
- ((struct dc_stream_state *)stream)->bl_pwm_level = level;
- }
+ if (stream)
+ ((struct dc_stream_state *)stream)->bl_pwm_level =
+ backlight_pwm_u16_16;
use_smooth_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
- DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n", level, level);
+ DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n",
+ backlight_pwm_u16_16, backlight_pwm_u16_16);
if (dc_is_embedded_signal(link->connector_signal)) {
if (stream != NULL) {
@@ -2189,9 +2189,9 @@ bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
1;
}
}
- abm->funcs->set_backlight_level(
+ abm->funcs->set_backlight_level_pwm(
abm,
- level,
+ backlight_pwm_u16_16,
frame_ramp,
controller_id,
use_smooth_brightness);
@@ -2205,7 +2205,7 @@ bool dc_link_set_abm_disable(const struct dc_link *link)
struct dc *core_dc = link->ctx->dc;
struct abm *abm = core_dc->res_pool->abm;
- if ((abm == NULL) || (abm->funcs->set_backlight_level == NULL))
+ if ((abm == NULL) || (abm->funcs->set_backlight_level_pwm == NULL))
return false;
abm->funcs->set_abm_immediate_disable(abm);
@@ -2594,6 +2594,10 @@ void core_link_enable_stream(
core_dc->hwss.unblank_stream(pipe_ctx,
&pipe_ctx->stream->sink->link->cur_link_settings);
+ dc_link_set_backlight_level(pipe_ctx->stream->sink->link,
+ pipe_ctx->stream->bl_pwm_level,
+ 0,
+ pipe_ctx->stream);
}
}